I've got a uv-vis spectrogram of a yellow coloured solution. What I'm having difficulty with is that there is no lambda max peak to help me work out the frequency: it's just a steady slope very similar to this one: www.trinity.edu/fwalmsle/MandMPictures/YellowDyeSpectrum.bmp

[size=medium]I'm not sure how to interpret this. I am inclined to suppose that there is just an increasing absorbance of wavelengths, and that if I were to